Tool-feed mechanism for shapers.



G. H. KNIGHT. TOOL FEED MECHANISM FOR SHAPERS.

APPLICATION FILED FEB. 1l-|918;

Patented Dc. 10, 1918,

3 SHEETS-SHEET'VI- me Naam; www: co. maw-mma.. mnsnmcmu. n. c.

G. H. KNIGHT. Tool. FEED MEcHANIsM FOR sHAPERs.

APPLICATION FILED FEB. 4.1918.

' 1,287,342. Patented Dec. 10, 1918.

SHEETS-SHEET 2.

n: lana nus ma. rumunm. wunmowu. a c.

G. H. KNIGHT. T ooL FEED MECHANISM FOR sHAPERs.

APPLICATION FILED FEB. 4| l9l8 1,287,342. `Paenfed Dec. 10, 1918. 3 SHEETSSHEET 3- UNITED STATES PATENT BEIGE,

GEORGE H. KNIGHT, OF TORRINGTON, CONNECTICUT, ASSIGNOR TO THE HENDEG MACHINE CO., OF TORRINGTON, CONNECTICUT, A CORPORATION.

TOOL-FEED MECHANISM FOR SHAPERS.

Specification of Letters Patent.

Patented Dec. 10, 1918.

Application led February 4, 1918. Serial No. 215,265.

To all whom z5 may concern Be it known that I, GEORGE I-I. KNIGHT, a citizen of the United States, residing at Torrington, in the county of Litchfield and State of Connecticut, have invented a new and useful Improvement in Tool-Feed Mechanism for Shapers; and I do hereby declare the following, when taken in connection with the accompanying drawings and the char4 acters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this application, and represent, in

Figure 1 a broken view in side elevation of the upper portion of a shaper provided with my improved tool-feed mechanism.

Fig. 2 a view thereof in front elevation.

Fig. 3 a broken view partly in elevation and partly in vertical section, on an enlarged scale, of the forward end of the ram and the parts mounted thereupon, a portion of the shaper-frame being also shown.

Fig. 4 a view thereof in transverse section on the line 4-4 of Fig. 3.

Fig. 5 a detached view in elevation of the 'feed-rocker of the tool-feed mechanism.

Fig. 6 a view of the ram in transverse scction on the line 6-6 of Fi 3, showing the means employed for binding the swivel head in any of its positions of adjustment.

My invention relates to an improved toolfeed mechanism for Shapers, the object being to provide a superior mechanism of the character described, characterized by beginning the feed operation at the beginning of the rearward stroke of the ram, by providing graduations Vfor the adjustment of the mechanism, and by furnishing a housing for theI mechanism except as to its manually operable parts.

With these ends in view, my invention consists in a tool-feed mechanism for shapers, the said mechanism having certain details of construction and combinations of parts as will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, for the feed of the cutting-tool 7 and for the regulation of such feed, I employ a normally stationary adjustable feed-bar 8 which rests upon the top of the shaper-frame 9 at a point alongside of a chambered ram 10 sliding in guide-ways 11 in the frame 9. The said bar 8 is secured by screws 12 to the rear vthe inner end of the loosening the screw 15, the block lets go its the rib and may then be movedA in one direction or the other upon the same for the adjustment of the feed-bar 8 for changing, as required, the position of the abutment-face 19 thereof with respect to an anti-friction roller 20 on a stud 21 inthe lower end of a feed-rocker 22 having a hub 23 by means of which it is loosely mounted upon a horizontal shaft 24 extending transversely into the ram 10, its inner end having bearing in a boss 25 extending inwardly into the chamber of theram and its outer end having bearing in a bushing 26 set into an opening 27 in the side of the ram. l he said feed-rocker 22 carries a pawl 28 mounted on a pin 29 and engaging with the teeth of a ratchet-wheel 30 formed integral with the outer end of the shaft 24 aforesaid. A helical spring 31 connecting the outer end of the pawl with an arm 32 upon the feedrocker, exerts a constant effort to enter the nose of the pawl into the teeth of the ratchetwheel. A helical torsion spring 33 encirclin the hub of the rocker, has its end 34 entere@ into the bushing 26, while its opposite end 35 is entered into the inner face of the rocker. The said spring 33 exerts a constant effort to turn the yrocker counter clockwise,

grip upon 'whereby the pawl 28 is dragged idly over ywith the abutment-face 19, this movement continuing until the rocker` is broughtto a stop by the engagement of a fiber pad 36 in its stop-arm 37 with an adjustable stop-pin 38 mounted in a graduated segment 39 at short hub 40 of a knob 41 turning on' a hollow stud 42 the inner end of which is formed with a threaded stem adapting it to be screwed into the outer face of a housing 43 the flange 44 of which is secured to a flange 45 formed at theouter end of the bushing 26. For shifting the position of the stop-pin 38 and holding itin place, its inner end is sharpened as at 46 for upon the outer face of the said flange45.'

bearing in the For holding the sharpened end 46 of the stop-pin 38 in any one of the slots 47, I employ a compression spring 49 located in an annular chamber 50 in the knob 41, the outer coil of the said spring engaging with a shoulder 51 upon the outer end of the hollow stud 42. The segment 39 has its edge beveled as at 52 and graduated for readings in conjunction with an index or set into the outer face of the housing 43. The position of the stop-pin 38 determines the extent to which the rocker 22 may be turned counter clockwise by the torsion spring '23, and lhence determines the idle 'travel of the pawl 28 over the teeth of the ratchet-wheel'30, the amount of suchltravel determining the amount of the turning of the ratchet-wheelon the back stroke of the ram 10.

A bevel gear -54 is secured by a key 55 to a bushing 56 turning loosely upon the inner end of the shaft 24 and formed at its outer end with clutch-teeth 57 co-acting with corresponding teeth 58 upon the rear endof a sliding-clutch 59 mounted on the shaft 24 on which it is free to slide, but to which it is coupled for rotation by means of a pin 60 passing transversely through it, and through the inner end of a clutch-rod 61 extending outward through the shaft 24 and through the ratchet-wheel 30 and through the hollow stud 42 from which it projects, its projecting end being furnished with an operating knob 62. A slot 63 in the shaft 24 provides for the clearance of the pin 60, and permits the clutch-rod 61 to'be longitudinally moved for the operation of the clutch 59. When the lrod 61 is pulled outward, as shown in Fig. 4, the clutch is disengaged from the bevel gear 54 and the tool-feed of the shaper is cut out of play. On the other hand, when the rod 67 lis pushed inward to interlock the clutch-teeth 57 and 58, the gear 54 is actuated for the feed of the tool 7. A small ball 64 and a spring 65 located in a recess 66 in the Arod 61, co-act with spaced holes 6? in the shaft 24 for yieldingly holding the clutch in engaged or disengaged positions.

The bevel gear 54 meshes into arbevel pinion v68, (Fig. 3) mounted upon a short shaft 69 journaled in the trunnion 70 of the swivel-head 7l, the said trunnion having forward end of the ram 10. The 4forward end of thesaid shaft has secured to it by a pin Y'72, a bevel pinion 73 which meshes into a bevel pinion 74 having a long sleeve V75 carrying a key 76 entering a long key-way 77 in the tool-feed screw 78, the upper end of which is rotatably connected-with the upper end of the slide 79 which is positively raised and lowered by the said feed-screw which in turn is raised .and'lowered by its rotation in a fixed nut 30 'fastened within a hole 31 in the swivel-head 7l. As the slide 7 9 is raised and lowered reference pin 53 by the screw 78, the tool raised and lowered with table 96 thereupon.

In the operation of my improved downfeed mechanism, the anti-friction roller 20 rides upon the feed-bar 8 so as to sustain the rocker 22 in its elevated position of readiness for operation, throughout the major portion of the rearward and forward movements of the ram 10. `When the ram has nearly reached the limit of its cutting stroke or forward movement, the roller 20 passes and rides down over the corner `of the abutment-face 19 of the feed-bar 8, giving the spring 33 an opportunity to swing the rocker 22 downward through its idle stroke during which the nose of the pawl 28 is idly dragged over the teeth of the ratchet-wheel 30. Now at the beginning of the rearward stroke of the ram, the roller 20 engages with feed-bar 8 and is forced to ride upward over the same, whereby the feed-rocker 22 is swung upward against the power of the spring 33 and made to perform its feedstroke in which the pawl 23 co-acts with the ratchet-wheel 30 to turn the same. It will be seen from this description that the entire swinging movement of the feed-rocker 22 takes place when the ram is substantially at the limit of its forward movement. At all other times the feed-rocker is sustained in an elevated position in readiness for opera- 7 is correspondingly respect to the worktion. by the riding of the roller 20 on the top i of the feed-bar 8, whereby the mechanism is simplified, and wear and shock avoided. I am thus enabled to operate the'ram at a high number of strokes per minute without loss of accuracy of feed due to shock which always results in wear and unevenness of feed. In my improved mechanism the length of the idle movement of the rocker is controlled to regulate the down feed, whereas, heretofore, the feed-stroke of the feed-rocker has been controlled to regulate the feed, by adjusting the position of the abutment with which it co-acts. Ordinarily the feed is begun when the ram is a short distance from the limit of its rearward movement, and therefore when moving with considerable speed, whereas I begin to feed just as the ram starts its rearward movement, and therefore when its speed is negligible and no shock occurs. Undervmy improvement, also, graduations are provided for the adjustment of the throw ofthe rocker, and the feed-mechanism is housed except as to its manually operated parts, e'. e., the knob 41 and segment 39 which are stationary except for bodily movement with the ram.

F or locking the swivel-head 71 in any Vof the positions into which it may be turned on its trnnnion in setting the tool 7, I form the said trunnion with a circumferensaid frame and tial groove 82 having its rear wall beveled as at 83 for co-action with a corresponding bevel Sfr formed upon the rear face of a segmental wedge 85 located in a transverse chamber 86 (Fig. 6) in the ram l0, and having an outwardly extending, centrally arranged circular stem 87 which is impinged upon by a pressure screw 88 located in a threaded hole 89 in the top of the ram 10, and having its outer end squared as at 90 for the reception of a suitable handle or wrench. By turning the screw 88 downward, the bevels 88 and 84.- co-act to force the rear face of the swivel-head 71 against the forward face 91 of the ram, whereby the swivel-head is firmly locked in place. The said segmental wedge 85 as thus constructed, provides a relatively large looking surface and -operates with great power without mutilating the surfaces with which it co-acts in the trunnion of the swivel-head. 'Ihe tcol-feed slide 79 is furnished with an apron 92 mounting al pivotal tool-block 93 provided with a tool-post 94 in which the cutting-tool 7, whatever its character may be, is secured.

I claim l. In a shaper, the combination with the frame thereof, of a ram, a tool-slide carried thereby, and mechanism for feeding the slide, includ'ng an adjustable feed-rocker and adjustable means mounted upon the directly co-acting with the rocker at the beginning of the rearward stroke of the ram for operating the rocker.

2. In a shaper, the combination with the frame thereof, of a ram, a tool-slide carried thereby, and mechanism for feeding the slide, including a feed-rocker and means with which the same directly coacts at the beginning of the rearward stroke of the ram for its operation.

8. In a Shaper, the combination with the frame thereof, of a ram, a tool-slide carried thereby, and mechanism for feeding the said slide, including a feed-rocker and a feed-bar upon which the same is supported except near the end of the forward or cutting stroke of the ram when the rocker is released, and at the beginning of the rearward stroke of the ram when the rocker is operated for feeding the tool-slide.

4. In a shaper, the combination with theV frame thereof, of a ram, a tool-slide carried thereby, a feed-rocker carried by the ram, a normally stationary abutment with which the said rocker engages at the beginning of the rearward stroke of the ram, and means for regulating the idle throw of the rocker.

5. In a Shaper, the combination with the frame thereof, of a ram mounted upon the frame, a tool-slide mounted upon the ram, and mechanism for feeding the said tool slide, including a feed-rocker, an adjustable stop for regulating the idle throw of the normally stationary rocker, a manually adjustable index carrying the said stop,and a normally stationary abutment with which the rocker co-acts at the beginning of the rearward stroke ofthe ram for actuating the rocker in its lfeedthrow.

6. In a shaper, the combination with the frame thereof, of a ram, a tool-slide carried thereby, and a mechanism for feeding the said tool-slide, including a feed-rocker, a abutment with which the said rocker directly enoja-ges at the beginning of the rearward stroke of the ram for the feeding operation of the rocker, a manually adjustable index-plate provided with .(riaduations, a stop-pin carried by the said plate and directly engaged by the said rocker for limiting the idle throwthereof, and a. segmental series of recesses for receiving the pin to vary the length of the said idle throw of the rocker.

7. In a shaper, the combination with the frame thereof, of a ram, a tool-slide carried by the ram, and mechanism for feeding the said slide, including a feed-rocker, a normally stationary abutment with which the rocker is engaged for its feed throw, an adjustable stop for limiting the idle throw of the rocker, and indicating means for directing the adjustment of the said stop.

8. In a Shaper, the combination with the frame thereof, of a ram, a tool-slide, and mechanism for feeding the same, including a feed-rocker carried by the said ram, a normally stationary abutment with which the rocker is engaged for its throw, a manually adjustable member, an index mark, means carried by the said member for limiting the idle movement of the rocker, indicating means for directing the adjustment of the said member, and means for holding the said indicating means in any of its positions of adjustment.

9. In a Shaper, the combination with the frame thereof, of a ram, a tool-slide, and mechanism for feeding the same, including a feed-rocker, a normally stationary abutment for imparting the feed throw thereto, a spring for the idle throw of the rocker, a housing applied to the ram for inclosing the said rocker and relatedparts, a stop for stopping the idle throw of the rocker, manually operable means for changing the position of the said stop in its relation to the rocker, and indicating means for directing the adjustment in its relation to the rocker, of the said stop.

10. In a shaper, the combination with the frame thereof, of a ram, a tool-slide carried thereby, and feeding mechanism mounted upon the said ram and including a feedrocker, a normally stationary abutment to co-act therewith to'impart the feed throw thereto, a housing applied to the ram for inclosing the roc-ker and its related parts, a

stud bearing in the said housing, :L plate .mounted upon the said stud, a stop-pin ce1'- ried by the said plate and engaged by the said rocker for limiting the idle movement thereof, means for looking the said plate and pin in their adjusted positions, and indieating means for directing the adjustment of the said plate and pin.

In testimoni" whereof, I hzix'efsigned This GEORGE. H. KNIGHT.

itnesses F. N. MCKENZIE, F. YV. FRESSENINE.

Copies of this patent may be obtained for ve cents each, by addressing` the Commissionei` of lPatents, Washington, D. C.

Correction in Letters Patent No.1,287,342.

It is hereby certiied that the assignee in Letters Patent N o. 1,287 ,342, granted December 10, 1918, upon the application of George H. Knight, of Torrington,

Connecticut, for an improvement in HTool-Feed Mechanism for Shapers, was Machine 0o., Whereas said The Handley Machine U0., as

shown by the record of assignments in this office; and that the said Letters erroneously described and specified as The Hendeg assignee should have been described and specified as Patent should be read with this Ycorrection therein that the same may conform to the record of the case in the Patent O'ice.

Signed and sealed this 21st day of January, A. D., 1919. A

F. W. H. CLAY,

Acting Commissioner of Patents.

[SEAL] 

